US AI Hype Drives Stock Rally and Corporate Rebranding, Gains Fade

Dozens of US‑listed companies renamed themselves to highlight artificial‑intelligence ambitions after a wave of investor enthusiasm. The rebrandings, spanning sectors from footwear (Allbirds becoming Smartbird) to biotech (Hoth Therapeutics to Rocket One) and crypto mining (Cipher Digital to Cipher AI), lifted the combined market value of the group by about 106% at their peaks, adding roughly $8.7 billion. Within weeks, more than half of that rise evaporated, and several firms now trade below their pre‑rebrand valuations.

At the same time, the broader AI‑driven rally on Wall Street is losing steam. After record highs in early June, the S&P 500 and Nasdaq Composite have slipped nearly 2% and 5%, respectively, as semiconductor makers—key suppliers for AI infrastructure—see sharp pullbacks. Micron Technology shares have dropped over 20% since their late‑June peak, and the PHLX semiconductor index is down about 15%. Investors are reassessing the sustainability of AI‑fuelled earnings growth and the spending plans of hyper‑scale tech firms, prompting heightened scrutiny of chip makers and a shift toward profit‑taking.